Vignetting device



FIG. 1 is an isometric view of a vignetting device, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a side elevational view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a vignetting device, as shown and described. 